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- W2062022383 abstract "It is known that the large electron-hole drops ($ensuremath{gamma}$ drops) that are formed in strain wells in Ge will be distorted in shape in a magnetic field, generally flattening to a disc with axis along the field. These effects have been interpreted as being due to recombination currents of electron-hole pairs required to maintain the droplets in steady state. A similar flattening has been predicted to occur in the small electron-hole drops ordinarily produced in unstressed Ge. The present paper develops a rigorous theory of the effect, using a technique previously applied to $ensuremath{gamma}$ drops. It is shown that the flattening, opposed by surface tension, occurs at somewhat higher fields than in the $ensuremath{gamma}$-drop case. Unlike that case, the flattening does not saturate at high fields, and as the field becomes very large the drop becomes a two-dimensional sheet. Also, beyond a critical field the drop is no longer convex, but develops a doughnutlike bulge. The theory is approximately corrected for the field dependence of the pair density, binding energy, and surface tension. Finally, a comparison with recent experimental results is interpreted as giving a field-dependent electron-hole collision rate that is quite similar to earlier results for $ensuremath{gamma}$ drops." @default.
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- W2062022383 date "1978-11-15" @default.
- W2062022383 modified "2023-09-25" @default.
- W2062022383 title "Shape of an electron-hole drop in a magnetic field in unstrained Ge" @default.
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- W2062022383 doi "https://doi.org/10.1103/physrevb.18.5573" @default.
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